Guild Wars 2's Neverending Story So Far

I basically didn't understand a word of this video. I thought it would help bring me up to speed on a game I haven't played since launch, but now I just feel even more lost. As far as I can tell thingy did wotsit with the whojathunk, but thingy turned up and did thingy instead, and then a thing happened which meant more things and now another thing is going to happen, and apparently that will mean the end of the 'living world' storyline in Guild Wars 2. The current one, anyway.

Which might mean there'll be a big expansion pack a la the original Guild Wars. Or might not. I can't even understand a trailer, so you'd best not expect me to successfully predict business models. In any case, this video is supposed to summarise the story so far ahead of its climactic quadrilogy of updates.

Here's what game director Colin Johanson has to say about whatever the heck's going on:

“As we announced back in December, we’re down to just four releases to go in the current storyline of living world. The first of those four releases is nearly upon us, and we wanted to help take a moment and look back at the key moments that have brought us up to this point as a refresher before we dive head-first into countdown to the big finale”.

The central villain of all this is one Scarlet Briar, who's been causing merry hell for over a year. That's her above. She doesn't look well to me.

Anyway, apparently the last four instalments of said living world over 2014 will "lead to one final moment that will change the face of Tyria forever." Like, a new zone?